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A Chinese factory produces mother-of-pearl buttons. The mean diameter of buttons is assumed to be normally distributed.If the machinery is working correctly, the mean diameter of the buttons will be 1.3cm. The variance for that machine is known to be 0.0081 cm2. A sample of 16 buttons is measured with a laser, and found to have a mean diameter of 1.25cm. Test at the 5% level of significance, the hypothesis that the mean diameter of the population differs from 1.3cm.
what are the steps in the construction
Suppose the salary of assembly line workers has Normal distribution with mean of $20,000, and standard deviation of $3,000.
How many degrees of freedom must researcher use in her t-test critical value supposing that variances are equal?
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With reference to Exercise 78, use the result of part (b) of Exercise 39 to construct a 99% confidence interval for the mean weekly net profit of restaurants with a seating capacity of 210 at a location where the daily traffic count averages 14,00..
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each private locker in the gym building is labeled with three upper-case alpha characters followed by two base 16
analyze the advantages and disadvantages of using a repeated-measures study or within-subjects design instead of a
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